The Chevrolet Camaro has been selected to pace the Indy 500 four times since its introduction, in 1967, 1969, 1982, and 1993.
Chevrolet didn't get much marketing mileage out of the '67 pace car, building only 100 (maybe as many as 500!) or so in addition to the three actual pace cars and the 78 festival and speedway cars. The extra cars were used as press and promotional vehicles, and the general public had only a limited chance to own one.
In 1969 there were also three actual pace cars, two for the race and one to be given to the winner, as in 1967. There were also 130 pace car replicas, mostly 350 automatics, and a few 396 big block cars. Chevrolet decided to make the most of the publicity surrounding the race and created Regular Production Option (RPO) Z11, which allowed anyone to order a pace car replica beginning in February, 1969. Chevy sold 3,675 of these cars, as well as a few hundred Z10 pace car hardtops.
In 1982 Chevrolet built a similar number of pace cars for the race, and sold 6,360 pace car replicas under RPO 1FP87, which you might recognize as the RPO for the Z/28 option, which the package was based on since there was no longer an SS model. When the 4th generation Camaro debuted in 1993 it also paced the Indy 500, the fourth Camaro and the ninth Chevrolet to do so, both records. Chevrolet sold 633 pace cars to the public, making the '93 the second rarest of the pace car family. The 93' Pace Car was also the first Chevy Pace Car to go from the showroom floor to the track without any engine modifications.